/*
 * The Open Source Unix Installer
 *
 * The MIT License
 *
 * Copyright 2011-2012 Andrey Pudov.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*
 * @author  Andrey Pudov    <andrey@andreypudov.com>
 * @version 0.00.00
 * @name    logger.c
 * @date:   Jan 16, 2012
 */

#include "logger.h"

/* private code definition */
static const char *_level_names[] = {"SEVERE", "WARNING", "INFO", "CONFIG", 
                                    "FINE", "FINER", "FINEST"};

/* public code definition */
Logger* installer_logger_new(FILE *file_pointer) {
    if (file_pointer == NULL) {
        return NULL;
    }

    Logger *logger = (Logger*) malloc(sizeof(Logger));
    if (logger == NULL) {
        return NULL;
    }

    /* set given descriptor */
    logger->file_pointer = file_pointer;

    return logger;
}

void installer_logger_delete(Logger *logger) {
    if (logger == NULL) {
        return;
    }

    free(logger);
}

void installer_logger_log(Logger *logger, Level level, const char *component, 
                          const char *message) {

	/* preseved errno value */
	int       errsv = errno;

    char      time_string[30];
    time_t    time_now    = time(NULL);
    struct tm time_struct = *(localtime(&time_now));

    if ((logger == NULL) || (message == NULL)) {
        return;
    }

    /* obtains the current date and time and formats like
     *     Mar 17, 1989 12:00:00 */
    strftime(time_string, sizeof(time_string), "%b %d, %Y %H:%M:%S", 
             &time_struct);

    fprintf(logger->file_pointer, "[#|%s|%s|%s|%s|%s|#]\n", time_string, 
            _level_names[level], component, message, strerror(errsv));

	/* write all buffered data */
	fflush(logger->file_pointer);

	/* set success error code */
	errno = EXIT_SUCCESS;
}
